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Trees or shrubs, usually with spines. Leaves imparipinnate. Leaflets 3 - 10 pairs, smooth edge. Stipule large, durable, often modified into spines. Numerous blossoms in lateral, pendulous, racemose inflorescences. Bell-shaped calyx, irregular, poorly bilabial, teeth shorter than tube. Corolla white, pink or purple, irregular, with five petals. Stamens 9+1, fused. The ovary goal fibrous or glandular, the bar extended, to tip fiber, stigma globose. Beans linear or oblong, strongly lateral flattened, closely elliptical cross section, with 3 - 10 seeds, slightly strangulated, naked or fibrous glandular, break out into. Seeds kidney, smooth, without appendage. Insects pollinating be propagated by seeds (artificial and cuttings).

• Table for determining the types

1   Inflorescences fibrous glandular. Beans fibrous glandular ................................................................................................................................... 2
1* Inflorescences are not fibrous glandular. Beans goal .................................................................................... * Black locust - R. pseudoacacia L.
2  Young twigs with thorns styliform ........................................................................................ Mexican acacia - R. luxurians (Dieck.) SK Schneid.
2*  Young twigs spineless ...................................................................................................................................................................................... 3
3   Shrub to 1.5 (3.0) m tall, usually grafted on R. pseudoacacia. Leaflets 7 – 13 …………………. ........................ * Bristly locust - R. hispida L.
3* Wood to 12.0 meters high. Leaflets (11) 13 - 25 (27) .............................................................................................................. R. viscosa Vent.

¹ Developed by B. Kouzmanov

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Robinia is a genus of flowering plants in the family Fabaceae, subfamily Faboideae, native to North America and northern Mexico. Commonly known as locusts,[1] they are deciduous trees and shrubs growing 4–25 metres (13–82 ft) tall. The leaves are pinnate with 7–21 oval leaflets. The flowers are white or pink, in usually pendulous racemes. Many species have thorny shoots, and several have sticky hairs on the shoots.
The genus is named after the royal French gardeners Jean Robin and his son Vespasien Robin, who introduced the plant to Europe in 1601.
The number of species is disputed between different authorities, with as few as four recognised by some authors,[2] while others recognise up to 10 species. Several natural hybrids are also known.
Some species of Robinia are used as food by larvae of Lepidoptera, including such moths as the brown-tail (Euproctis chrysorrhoea), the buff-tip (Phalera bucephala), the engrailed (Ectropis crepuscularia), the giant leopard moth (Hypercompe scribonia), the locust underwing (Euparthenos nubilis), and Chrysaster ostensackenella.
From Wikipedia, the free encyclopedia

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